The Detroit police chief has been placed on a 30-day suspension while the city conducts an investigation into allegations of an affair with a woman on the force who is seen in a Twitter photo holding what appears to be her police-issued 9-mm.Glock handgun in her mouth, MyFoxDetroit.com reported.

"After learning of the allegations regarding Chief Ralph Godbee, I have placed him on a 30-day suspension pending a full and thorough investigation of this matter,” Mayor Dave Bing said in a statement.

On Saturday, she thought he was in San Diego with another woman during a police conference, the report said. She reportedly began tweeting disturbing photos, including one with a 9-mm. gun in her mouth.

Godbee saw the tweets and provisioned some police staff to check on Robinson, which raises some issues about jurisdiction since it was in another town, the report said.

There's some irony in the suspension.

Godbee became chief two years ago after former Chief Warren Evans was forced to resign. Bing cited Evans' relationship with a subordinate, Lt. Monique Patterson, as the reason for the resignation. Bing said at the time it compromised Evans' ability to lead.